CN201966318U - Left-right-hand circular polarization reconfigurable antenna - Google Patents
Left-right-hand circular polarization reconfigurable antenna Download PDFInfo
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- CN201966318U CN201966318U CN2011200203205U CN201120020320U CN201966318U CN 201966318 U CN201966318 U CN 201966318U CN 2011200203205 U CN2011200203205 U CN 2011200203205U CN 201120020320 U CN201120020320 U CN 201120020320U CN 201966318 U CN201966318 U CN 201966318U
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- metal layer
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Abstract
The utility model relates to a left-right-hand circular polarization reconfigurable antenna. The present product has high price and complicated process. The left-right-hand circular polarization reconfigurable antenna comprises a medium substrate, an upper metal layer which is coated on the upper surface of the medium substrate, and a lower metal layer which is coated on the lower surface of the medium substrate; the upper metal layer is provided with an annular direct-current stopping gap, and two ends of a direct-current power supply are respectively connected with the upper metal layer at two sides of the direct-current stopping gap; the lower metal layer is provided with an annular radiation gap, and the lower metal layer bridging over two sides of the radiation gap is connected with two biased diodes with opposite phases; a plurality of electric interconnection units which pass through the upper metal layer, the medium substrate and the lower metal layer are sequentially arranged to form an electric interconnection array; a cavity is formed at the area which is encircled by the upper metal layer, the lower metal layer and the electric interconnection array, and a feed unit stretches into the cavity; and a conducting element passes through the upper metal layer and the medium substrate which is surrounded by the direct-current stopping gap and the lower metal layer which is surrounded by the radiation gap. The left-right-hand circular polarization reconfigurable antenna has good radiation performance, high gain and low contour, can be integrated with a seamless plane, is easy to design and process, and has low cost.
Description
Technical field
The utility model belongs to microwave technical field, relate to a kind of left and right sides rounding polarization reconfigurable antenna, can be used as the antenna of radio frequency receiving and transmitting front end, be widely used in wireless communication systems such as mobile communication, satellite communication, radar, be used to solve the polarization mismatch problem that Faradic electricity magnetic rotation effect, misty rain interference etc. cause, this antenna can overcome the multipath energy decline, realizes channeling, increase power system capacity simultaneously.
Background technology
As the critical component of communication system, antenna is widely used in the radio communication occasion.Because the Faraday rotation effect of electromagnetic wave propagation in the space, and the uncertainty of the reception antenna position in the mobile communication, if adopt traditional single-polarized antenna, need the dual-mode antenna Polarization match to aim at and to realize reception preferably as Transmit-Receive Unit.And the constant amplitude rotating field that circular polarized antenna radiates can be decomposed into two quadrature linear polarization ripples that the amplitude equal phase differs 90 degree, is widely used in the problem that solves polarization mismatch in the radio communication.Simultaneously because the rotation direction of circularly polarised wave when inciding symmetrical target reverses characteristic, can be applicable to mobile communication, satellite communication field inhibition misty rain interference and anti-multipath reflection, the reconfigurable antenna of left and right sides rounding polarization simultaneously can avoid multipath energy weak, thereby realizes that channeling improves power system capacity.Therefore the simple and high performance left and right sides of project organization rounding polarization reconfigurable antenna not only can significantly improve the performance and the capacity of system, can greatly alleviate the index pressure of follow-up radio circuit simultaneously, reduces the cost of system.
The implementation of left and right sides rounding polarization reconfigurable antenna is varied, and the circular polarized antenna of little band forms is most widely used because having the easily conformal advantage of low profile.Its feeding classification mainly contains slit coupling feed and coaxial waveguide feed dual mode, and wherein coupling feed in slit mainly adopts multilayer board technology to realize, the high and technology of price is not very stable for domestic technology.Though and the coaxial feed mode is simple, it can not be seamless integrated with planar circuit, causes volume bigger.They are for realizing the needed biasing circuit more complicated of circular polarization restructural characteristic, and lamped elements such as needed switching diode and partiting dc capacitor often cause processed complex with high costs.The present Research of the comprehensive polarization of left and right sides rounding at present reconfigurable antenna still needs to study the high-performance left and right sides rounding polarization reconfigurable antenna that the new construction of adopting new technology is realized low-cost low profile as can be known.
Summary of the invention
The purpose of this utility model provides a kind of left and right sides rounding of being realized by the planar circuit process technology fully reconfigurable low profile back-cavity antenna that polarizes, this novel circular polarized antenna radiance is good, gain is high, profile is low, but seamless flat surface is integrated, only needs two switching diodes in the lamped element, do not need partiting dc capacitor, biasing circuit simple, be easy to design, be easy to processing, with low cost.It is well better that this antenna and existing antenna of the same type are compared radiance, and biasing circuit is more succinct, and manufacturing cost significantly reduces.
The left and right sides of the present utility model rounding polarization reconfigurable antenna comprises:
The lower metal layer that last metal level that dielectric substrate, dielectric substrate upper surface apply and dielectric substrate lower surface apply;
Last metal level has the stopping direct current slit that is used to cut off DC loop, and described stopping direct current slit is the ring-like slit of running through metal level;
The two ends of DC power supply connect the last metal level on both sides, stopping direct current slit respectively;
Lower metal layer has and is used for electromagnetic wave is coupled to the space or is coupled into the radiating slot of cavity from the space from cavity, and described radiating slot is the ring-like slit of running through lower metal layer;
The lower metal layer of striding the radiating slot both sides is connected with the diode of two back biased;
The electrical interconnection sequence of unit of the lower metal layer of a plurality of last metal level, dielectric substrate and radiating slot peripheries of running through periphery, stopping direct current slit is arranged the electrical interconnection array that constitutes; Duty ratio between any two adjacent electrical interconnection unit of formation electrical interconnection array is greater than 1;
Constitute cavity by last metal level, lower metal layer and electrical interconnection array area surrounded, feed element stretches in this cavity;
The conductive element that runs through the lower metal layer of last metal level, dielectric substrate and radiating slot encirclement that the stopping direct current slit surrounds.
Described stopping direct current slit is positioned at the view field of radiating slot;
Described radiating slot has plane symmetry; The outline line of described feed element and electrical interconnection array is all with the plane of symmetry symmetry of radiating slot.
Described dielectric substrate is the single-layer medium substrate, and feed element is band ground coplanar waveguide transmission line.
Described electrical interconnection unit is plated-through hole or metal column.
The utility model is equivalent to the novel cavity body structure in conventional metals chamber by the manufacturing of employing planar circuit process technology on common dielectric substrate, thereby has greatly reduced the volume of back-cavity circularly polarized antenna.With traditional cavity-backed radiator antenna need accurate machining different be that this new antenna comprises that feeding network can adopt the common planar circuit technology to make (as printed circuit board (PCB), LTCC etc.), cost of manufacture significantly reduces, and can realize seamless integrated with planar circuit.Ingenious utilization simultaneously has the ring-like slit of two back biased diodes loadings as radiating element, just can realize left and right sides rounding polarization reconfigurable antenna by simple biasing circuit.
Concrete operation principle: electromagnetic energy is incorporated in the cavity that is made of electrical interconnection array and two metal levels by feed line, and in cavity and the area excitation of being limit outside the big annulus play a plurality of degeneracy modes of resonance.Can regulate conducting or the cut-off state that is connected across two switching diodes on the big ring-like slit by the bias voltage or the electric current that change dc bias circuit.When switching diode is in conducting state, is equivalent to big ring-like slit in this actuating switch diode position short circuit, and when switching diode is in cut-off state, is equivalent to big ring-like slit at this actuating switch diode position open circuit.Introduce short dot on the big ring-like slit, a plurality of degeneracy modes of resonance outside the big ring-like slit in the cavity can be separated and produce circular polarization radiation.The change of short dot position can be switched left-handed or the right-handed circular polarization radiation, thereby makes antenna become left and right sides rounding polarization reconfigurable antenna.The operating frequency that the size in adjusting cavity and big ring-like slit can be regulated antenna easily.
The utlity model has following beneficial effect:
A. this novel left and right sides rounding polarization reconfigurable antenna has kept the good radiation characteristic of traditional metal backing cavity circularly polarized antenna high-gain etc., simultaneously entire antenna comprises that back of the body cavity configuration and feeding network can realize on substrate, make that not only antenna volume greatly reduces, and entire antenna can be seamless integrated with system complete plane, improved the integrated level of system.
B. this novel left and right sides rounding polarization reconfigurable antenna biasing circuit is simple, no longer needs any lamped element except two switching diodes, biasing circuit with simplify there to be left and right sides rounding polarization reconfigurable antenna to compare greatly, cost of manufacture simple in structure is cheap.
C. this novel back-cavity circularly polarized antenna is made simple and convenient, just can realize with the common planar circuit technology.Compare with the precision machined cavity-backed radiator antenna of traditional needs, manufacturing speed is fast, and is with low cost.
Description of drawings
Fig. 1 is the perspective view of the utility model one embodiment;
Fig. 2 is the structural representation on the upper surface metal level plane of living in of Fig. 1;
Fig. 3 is the structural representation on the lower surface metal layer plane of living in of Fig. 1;
Fig. 4 is the utility model embodiment left-hand circular polarization antenna pattern when 10GHz;
Fig. 5 is the utility model embodiment right-handed circular polarization antenna pattern when 10GHz.
Embodiment
As shown in Figure 1, left and right sides rounding polarization reconfigurable antenna comprises that thickness is 0.5 millimeter dielectric substrate 1, and there is metal level on the two sides of dielectric substrate 1, is respectively metal level 2 and metal level 3.Running through dielectric substrate 1, metal level 2 and metal level 3, diameter is arranged is 1 millimeter through hole, and through-hole wall is coated with metal, forms electrical interconnection unit 4.A plurality of electrical interconnections unit 4 sequence arrangement be have a square outline line and the square length of side be 18.5 millimeters electrical interconnection array, the electrical interconnection cell orifice spacing that constitutes foursquare electrical interconnection array is identical, is 1.5 millimeters.Metal level 2, metal level 3 and electrical interconnection array institute inclusion region form foursquare cavity.As Fig. 2, the coplanar waveguide transmission line 5(dashed rectangle that metal level 2 is useful on feed comprises part), 8.2 millimeters of the length of coplanar waveguide transmission line 5, the width of the width of air gap and intermetallic metal band is respectively 0.7 millimeter and 1.45 millimeters.Coplanar waveguide transmission line 5 stretches in the cavity, and its top is apart from 6.0 millimeters at the center of cavity, and the plane of symmetry of coplanar waveguide transmission line 5 overlaps with a plane of symmetry of cavity.Metal level 2 has the little ring-like slit 7 of a square that 0.2 millimeter of width, 1.6 millimeters of the length of sides and four limits are parallel with cavity limit wall, the center overlaps in the cavity zone.Be welded with two leads on by little ring-like slit 7 separated interior metal sheets and exterior metal sheets, lead connects DC power supply formation dc bias circuit 10(dotted ellipse frame and comprises part); As Fig. 3, metal level 3 has the big ring-like slit 6 of a square that 1 millimeter of width, 9.7 millimeters of the length of sides and four limits are parallel with cavity limit wall, the center overlaps in the cavity zone.Symmetric position on the center line vertical with the plane of symmetry of coplanar waveguide transmission line 5 of big ring-like slit 6 has the switching diode 8 of two back biased to comprise part with 9(broken circle frame) be used to be connected the metal on 6 both sides, big ring-like slit; Running through dielectric substrate 1, metal level 2 and metal level 3 in the center of cavity has a conductive element 11 that is made of the plated-through hole of 0.4 millimeter of diameter, and the sheet metal that will be in the sheet metal of inside, little ring-like slit of different layers and inside, big ring-like slit is communicated with and forms the equipotentiality body.The concrete structure geometric parameter is as follows:
| L c ? (mm) | 18.5 | l c ? (mm) | 6.0 |
| L s (mm) | 9.7 | W s (mm) | 1.0 |
| L i (mm) | 1.6 | W i (mm) | 0.2 |
| d (mm) | 1.0 | d p ? (mm) | 1.35 |
| L cpw?(mm) | 8.2 | g cpw (mm) | 0.7 |
| W cpw (mm) | 1.45 | d i (mm) | 0.4 |
Wherein
L c Be the length of side of square cavity,
L Cpw ,
W Cpw With
g Cpw Be respectively the width of length, intermetallic metal band and the air gap of coplanar waveguide transmission line,
L s With
W s Be respectively the length of side and the width in foursquare big ring-like slit,
L i With
W i Be respectively the length of side and the width in foursquare little ring-like slit,
L c Be the top of coplanar waveguide transmission line and the distance between the cavity center,
dBe the diameter of the through hole that constitutes the electrical interconnection unit,
d p Be the hole heart distance of the through hole that constitutes the electrical interconnection array,
d i Diameter for the through hole that constitutes conductive element 11.
The concrete manufacture process of this left and right sides rounding polarization reconfigurable antenna is: at first choose the dielectric substrate of corresponding parameter, be both square and parallel little ring-like slit and big ring-like slit with same position as the center manufacturing simultaneously on two metal levels.Be manufactured with the coplanar waveguide transmission line that is used for feed at the metal level that little ring-like slit is arranged, run through substrate and two sides metal level, make a call to a plated-through hole in the center in foursquare ring-like slit, be that a series of metal through holes are beaten with uniform interval in the center with this plated-through hole simultaneously, constitute limit wall and the parallel square cavity in four limits, ring-like slit.Select suitable aperture and pitch of holes, avoid energy to the cavity external leakage.In the center on two limits parallel, big ring-like slit, two switching diodes are welded on the metal on both sides, big ring-like slit with the back biased state with coplanar waveguide transmission line.Two leads of welding on the inside and outside metal that is separated by little ring-like slit, two leads connect a DC power supply again, constitute a complete novel left and right sides rounding polarization reconfigurable antenna.This new antenna has kept the high-gain radiation characteristic of conventional metals back-cavity circularly polarized antenna, and its biasing circuit is compared simpler with existing left and right sides rounding polarization reconfigurable antenna, and required lamped element still less.Select appropriate cavities and big ring-like gap size, the operating frequency that can regulate this antenna easily.Entire antenna can be fully realizes by common planar circuit fabrication technology, can be fully seamless integrated with system.
The directional diagram result of Fig. 4 and Fig. 5 shows that this left and right sides rounding polarization reconfigurable antenna left-hand circular polarization and right-handed circular polarization radiation all have the good radiation characteristic that gain is high, directionality is good, cross polarization level is low.
Claims (7)
1. left and right sides rounding polarization reconfigurable antenna is characterized in that this antenna comprises:
The lower metal layer that last metal level that dielectric substrate, dielectric substrate upper surface apply and dielectric substrate lower surface apply;
Last metal level has the stopping direct current slit that is used to cut off DC loop, and described stopping direct current slit is the ring-like slit of running through metal level;
The two ends of DC power supply connect the last metal level on both sides, stopping direct current slit respectively;
Lower metal layer has and is used for electromagnetic wave is coupled to the space or is coupled into the radiating slot of cavity from the space from cavity, and described radiating slot is the ring-like slit of running through lower metal layer;
The lower metal layer of striding the radiating slot both sides is connected with the diode of two back biased;
The electrical interconnection sequence of unit of the lower metal layer of a plurality of last metal level, dielectric substrate and radiating slot peripheries of running through periphery, stopping direct current slit is arranged the electrical interconnection array that constitutes; Duty ratio between any two adjacent electrical interconnection unit of formation electrical interconnection array is greater than 1;
Constitute cavity by last metal level, lower metal layer and electrical interconnection array area surrounded, feed element stretches in this cavity;
The conductive element that runs through the lower metal layer of last metal level, dielectric substrate and radiating slot encirclement that the stopping direct current slit surrounds.
2. rounding polarization reconfigurable antenna in a kind of left and right sides as claimed in claim 1 is characterized in that described stopping direct current slit is positioned at the view field of radiating slot.
3. rounding polarization reconfigurable antenna in a kind of left and right sides as claimed in claim 1 is characterized in that described radiating slot has plane symmetry.
4. a kind of left and right sides as claimed in claim 3 rounding polarization reconfigurable antenna, the outline line that it is characterized in that described feed element and electrical interconnection array are all with the plane of symmetry symmetry of radiating slot.
5. rounding polarization reconfigurable antenna in a kind of left and right sides as claimed in claim 1 is characterized in that described dielectric substrate is the single-layer medium substrate.
6. rounding polarization reconfigurable antenna in a kind of left and right sides as claimed in claim 5 is characterized in that described feed element is band ground coplanar waveguide transmission line.
7. rounding polarization reconfigurable antenna in a kind of left and right sides as claimed in claim 1 is characterized in that described electrical interconnection unit is plated-through hole or metal column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200203205U CN201966318U (en) | 2011-01-21 | 2011-01-21 | Left-right-hand circular polarization reconfigurable antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200203205U CN201966318U (en) | 2011-01-21 | 2011-01-21 | Left-right-hand circular polarization reconfigurable antenna |
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| Publication Number | Publication Date |
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| CN201966318U true CN201966318U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200203205U Expired - Fee Related CN201966318U (en) | 2011-01-21 | 2011-01-21 | Left-right-hand circular polarization reconfigurable antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107421A (en) * | 2011-11-04 | 2013-05-15 | 美国博通公司 | Antenna system |
| CN104393400B (en) * | 2014-11-25 | 2017-02-22 | 重庆大学 | Circular polarization frequency express substation small antenna based on capacitive loading parasitic ring |
| CN107046169A (en) * | 2016-10-31 | 2017-08-15 | 东南大学 | A kind of polarization reconfigurable antenna |
-
2011
- 2011-01-21 CN CN2011200203205U patent/CN201966318U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107421A (en) * | 2011-11-04 | 2013-05-15 | 美国博通公司 | Antenna system |
| US9270026B2 (en) | 2011-11-04 | 2016-02-23 | Broadcom Corporation | Reconfigurable polarization antenna |
| CN103107421B (en) * | 2011-11-04 | 2016-08-03 | 美国博通公司 | Antenna system |
| CN104393400B (en) * | 2014-11-25 | 2017-02-22 | 重庆大学 | Circular polarization frequency express substation small antenna based on capacitive loading parasitic ring |
| CN107046169A (en) * | 2016-10-31 | 2017-08-15 | 东南大学 | A kind of polarization reconfigurable antenna |
| CN107046169B (en) * | 2016-10-31 | 2019-06-25 | 东南大学 | A kind of polarization reconfigurable antenna |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20140121 |